6648 	struct extent_map_tree *map_tree = &fs_info->mapping_tree;  in read_one_chunk()  local
6673 	read_lock(&map_tree->lock);  in read_one_chunk()
6674 	em = lookup_extent_mapping(map_tree, logical, 1);  in read_one_chunk()
6675 	read_unlock(&map_tree->lock);  in read_one_chunk()
6744 	write_lock(&map_tree->lock);  in read_one_chunk()
6745 	ret = add_extent_mapping(map_tree, em, 0);  in read_one_chunk()
6746 	write_unlock(&map_tree->lock);  in read_one_chunk()
7064 	struct extent_map_tree *map_tree = &fs_info->mapping_tree;  in btrfs_check_rw_degradable()  local
7069 	read_lock(&map_tree->lock);  in btrfs_check_rw_degradable()
7070 	em = lookup_extent_mapping(map_tree, 0, (u64)-1);  in btrfs_check_rw_degradable()
7071 	read_unlock(&map_tree->lock);  in btrfs_check_rw_degradable()
7109 		read_lock(&map_tree->lock);  in btrfs_check_rw_degradable()
7110 		em = lookup_extent_mapping(map_tree, next_start,  in btrfs_check_rw_degradable()
7112 		read_unlock(&map_tree->lock);  in btrfs_check_rw_degradable()